1980 - Royal Horticultural Society - Gold medal 1983 - Royal Horticultural Society - Grenfell Silver Gilt Medal 1985 - Royal Horticultural Society - Grenfell Silver Gilt Medal 1988 - Royal Horticultural Society - Gold Medal 1991 - Alpine Garden Society - Gold Award 1993 - Alpine Garden Society - Gold Award 1994 - Royal Horticultural Society - Gold Medal 1996 - Royal Horticultural Society of Ireland - Medal of Honour 1997 - Royal Horticultural Society - Grenfell Silver Gilt Medal 1997 - University of Dublin - Doctor in Litteris 1998 - Royal Dublin Society - Honorary Life Member 2001 - Royal Horticultural Society - Grenfell Silver Gilt Medal 2002 - Royal Horticultural Society - Grenfell Silver Gilt Medal · Hon. Member of Irish Garden Plant Society · Friends of the Library, Trinity College, University of Dublin